TM 9-2330-356-14
(2) Install needle bearing (7) and oil seal (6) from
(2) Bearings. Replace bearings if clearances are
outside of gearcase. Ensure that oil seal is flush with
outside surface of gearcase.
grooved, or broken.
(3) Join the oil seal loader and driver tool (13)
(3) Rear Oil Seal. Inspect seal (17, fig. 7-27) for
together, and slide the oil seal (11) into position with lip
wear or damage which might cause it to leak. Use oil seal
toward the driver tool. Remove oil seal loader.
Rebuild Crankshaft. If crankshaft requires
(4) Place the gearcase on a firm flat surface and
b.
regrinding, metallize and regrind to standards. Special
install the oil seal flush with the gearcase outer surface.
procedures must be observed when reworking diesel
crankshafts. In addition to regrinding, the crankshaft must
(5) Install the governor shaft (5) and check shaft
for binding.
be shot-peened and super-finished. Failure to shot-peen
the crankpin fillets is likely to cause early failure. When
(6) Install the governor yoke (2) on the shaft with
the crankshaft is reground, follow this data and figure 7-61
smooth side toward the governor cup, and secure with
to shot-peen each crankpin fillet.
external retaining ring (1).
(1) Peen with 0.019-inch diameter cast steel shot.
Test and Adjustment.
e.
(2) Peen for 30 seconds on each crankpin fillet.
(1) Work the governor shaft to check for binding.
(3) Mask off connecting rod bearing arms.
a. Replace any flyballs that have flat spots or
graves.
Replace cup if race surface is grooved or rough.
b.
The governor cup must be a free spinning fit on camshaft
center pin, but should be replaced if excessively loose or
wobbly.
c.
Check distance the center pin extends from the
camshaft gear. This distance must be 0.781-inch to give
proper travel distance for the cup. If it is less, the engine
may race; if more, the cup will not hold the balls properly.
If distance is too great, drive or press center pin
d.
in. If it is too small, replace pin; it cannot be removed
without damaging the surface.
If aluminum ball spacer openings are badly worn,
e.
replace ball spacer (camshaft gear must be removed for
this).
a.
Cleaning and Inspection.
Disassembly.
a.
(1) Crankshaft. Clean crankshaft and clear out all
(1) Remove nut (1) and lockwasher (2) from
oil passages. Check journals for out-of-round, taper,
grooving, or ridges. Pay particular attention to ridges or
solenoid (9). Tag and remove lead (3). Disconnect
grooves on either side of oil hole areas. Unusual
connector and grommet (4).
conditions here often point to previous neglect of oil
(2) Remove cotter pin (5) and pin (6) from yoke
changes. If journal dimensions are not within limits or
journals are scored, metallize and regrind crankshaft to